Quote from traderNik:
I've fought my way back from about 20-30 pounds overweight a few times (never got over 200 pounds, I'm 5'11"). My technique:
1. Eliminate all breads, carbs, pasta rice. You will eat none of these for the duration, except oatmeal before your cardio
2. Limit your caloric intake to about 900 - 1000 calories a day. Don't believe any of the bullshit people tell you, this is plenty to maintain your health if you are eating the right things. You know what to eat. At all costs, do not use diet soft drinks to get sweet taste/fill your stomach. Aspartame is the worst stuff the FDA ever approved. Find out what it originally was and how they came to find out it's a sweetener.
3. Buy a big tub of the highest quality protein powder you can find (go to supplement store where the weightlifters get their supply).
3. Long and slow cardio activity. If you haven't been working out, a fast walk will do to start. Eat a serving or two of oatmeal 1.5 hours before cardio. It is crucial that you keep your heart rate moderately high. Too high and catabolism sets in (muscle mass being burned for energy). At least 3 workouts per week, and that's not really enough.
This is crucial to get your metabolism going and to burn calories.
4. Eat 5 times per day, very small meals (very hard to do, but crucial). Do one scoop of the protein powder every day
5. Get high quality multivitamins and do them plus a separate calcium supplement.
6. If you're overweight, your muscles are undoubtedly atrophied. If you can discipline yourself, do pushups and chinups. Forget trying to do weights at the gym at this point - if you lose the weight you can then attempt to start to build your base back up.
7. Tons of water.
If you do this for 6 weeks straight you will lose at least 15 pounds. Do not bother weighing yourself every day, weight doesn't come off like that.